Quantech QTC3150THE User Manual

QUANTECH
6
FORM QTC3-NM1
ISSUE DATE 08/03/2022
TABLE OF CONTENTS (CONT’D)
SECTION 6 – COMMISSIONING .......................................................................................................................103
Preparation – Power Off ............................................................................................................................... 103
Preparation – Power On ............................................................................................................................... 105
How to Commission the Pump VFD ............................................................................................................. 106
SECTION 7 – UNIT CONTROLS ........................................................................................................................ 111
Introduction ................................................................................................................................................... 111
IPU II and I/O Boards ................................................................................................................................... 111
Transformer ................................................................................................................................................. 112
Display .......................................................................................................................................................... 112
Keypad ......................................................................................................................................................... 112
Unit Switch ................................................................................................................................................... 112
Battery Back-Up ........................................................................................................................................... 112
Programming # of Compressors .................................................................................................................. 112
Status Key .................................................................................................................................................... 113
Display/Print Keys ........................................................................................................................................ 119
Entry Keys ....................................................................................................................................................127
Setpoints Keys .............................................................................................................................................128
Schedule/Advance Day Key ......................................................................................................................... 129
Program Key ................................................................................................................................................131
Unit Keys .....................................................................................................................................................137
Bacnet, Modbus, N2, and E-Link Communications ...................................................................................... 143
SECTION 8 – UNIT OPERATION ......................................................................................................................155
Unit Operating Sequence .............................................................................................................................155
Capacity Control ........................................................................................................................................... 155
Suction Pressure Limit Controls ...................................................................................................................156
Discharge Pressure Limit Controls ............................................................................................................... 156
Leaving Chilled Liquid Control ......................................................................................................................156
Leaving Chilled Liquid Control Override to Reduce Cycling .........................................................................157
Leaving Chilled Liquid System Lead/Lag and Compressor Sequencing ......................................................158
Return Chilled Liquid Control .......................................................................................................................158
Return Chilled Liquid System Lead/Lag and Compressor Sequencing .......................................................159
Anti-Recycle Timer .......................................................................................................................................159
Anti-Coincidence Timer ................................................................................................................................159
Evaporator Pump Control and Hydro Kit Pump Control ...............................................................................159
Evaporator Heater Control ...........................................................................................................................160
Pumpdown Control ....................................................................................................................................... 160
Standard Condenser Fan Control ................................................................................................................160
VSD Fan ....................................................................................................................................................... 160
Changing the Switch Point of the Thermal Dispersion Flow Switch ............................................................. 160
Load Limiting ................................................................................................................................................164
Compressor Run Status ...............................................................................................................................164
Alarm Status ................................................................................................................................................. 164
Remote BAS/EMS Temperature Reset Using a Voltage or Current Signal .................................................. 165

Quantech QTC3150THE Specifications

General

Brand	Quantech
Model	QTC3150THE
Category	Chiller
Language	English